一种基于灰度分割的调焦评价函数  

Focusing Evaluation Function Based on Gray Scale Segmentation

作　　者：蒋昀赟[1] 汪同庆[2] 叶俊勇[2] 李宏友[2] 

机构地区：[1]重庆工商大学,重庆400067 [2]重庆大学光电技术及系统教育部重点实验室,重庆400030

出　　处：《现代电子技术》2009年第6期119-121,共3页Modern Electronics Technique

摘　　要：提出一种新的基于灰度分割的调焦评价函数。该函数利用清晰图像的灰度变化比模糊图像频繁的原理,以待调焦区域灰度均值作为其变化中心,并以该中心进行分割,最终计算出灰度围绕中心的变化频度作为评价函数值。比较了该函数和其他评价函数的效果。实验证明,该函数满足调焦评价函数的要求,可以在实际工程中较好的应用。A focusing evaluation function based on gray scale segmentation is proposed. The theory of that sharp images＇ gray changes more frequently than that of blur images is used in this function. And center of the change is average gray scale of the interest region and segment region. Finally frequency of the gray scale changes surround the center is figure out as the evaluation function value. Comparing the function with other evaluation functions. The experience proves that the function accords with the requests of focusing evaluation functions and can be well used in factual projects.

关 键 词：调焦评价函数 灰度变化 二值化 边缘检测 灰度分割 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]